Banded Rainbowfish Identification Guide
Recognize this Arnhem Land native by its multiple bold longitudinal stripes running the length of the body.
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Key identification features
- Deep, laterally compressed body typical of Melanotaenia, reaching 3-4 inches (8-10 cm)
- Two to four bold, continuous horizontal stripes running from head to tail, ranging from red-orange to blue-purple depending on population
- Coloration varies strongly by locality, but the striped pattern itself is consistent
- Males show intensified stripe color and red-edged fins; females are paler with muted banding
- Two dorsal fins and a forked tail
- Body depth and stripe count can differ noticeably between isolated river systems within its range
Common look-alikes
- Australian Rainbowfish: shows only faint stripes rather than bold, well-defined bands
- Eastern Rainbowfish: has a single prominent dorsal stripe rather than multiple parallel bands
- Madagascar Rainbowfish: shows one solid black stripe instead of several colored bands
Where you'll see one
Native to clear rocky streams and rivers of the Arnhem Land plateau in Australia's Northern Territory, often in flowing water over rock and gravel. It tends to hold position in current near boulders and rock ledges.
Frequently asked questions
How many stripes does a Banded Rainbowfish typically show?
Usually two to four continuous horizontal stripes run the length of the body, though the exact color varies by population.
How do I separate it from the similarly striped Australian Rainbowfish?
The Banded Rainbowfish's stripes are bold and sharply defined, while the Australian Rainbowfish shows only faint, indistinct striping.